{"product_id":"ds18-nxl-x850-4d-hydro-4-channel-full-range-class-d-marine-powersports-amplifier-ip67-4-x-200w-rms-4-ohms","title":"DS18 NXL-X850.4D HYDRO 4-Channel Full-Range Class D Marine \u0026 Powersports Amplifier, IP67, 4 x 200W RMS @ 4 ohms","description":"\u003cp\u003eThe DS18 NXL-X850.4D HYDRO is a high-output, four-channel full-range Class D amplifier designed for marine and powersports sound systems. Its sealed IP67-rated construction, compact format, and selectable crossover settings let installers build reliable multi-speaker systems without giving up essential system-tuning controls.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFour independently amplified channels for full-range speakers or bridged operation into appropriate 4-ohm loads\u003c\/li\u003e\n\u003cli\u003eHigh-efficiency Class D power stage designed to limit heat and current draw compared with traditional amplifier designs\u003c\/li\u003e\n\u003cli\u003eIP67-rated construction with UV and salt-fog resistance for challenging recreational installations\u003c\/li\u003e\n\u003cli\u003eSelectable onboard crossover modes and adjustable 40Hz–2kHz frequency range\u003c\/li\u003e\n\u003cli\u003eRCA line output supports signal distribution to an additional amplifier\u003c\/li\u003e\n\u003cli\u003e2-channel \/ 4-channel input selection; LED power, protection, and clipping indicators\u003c\/li\u003e\n\u003cli\u003eTinned OFC direct-power harness, quick-connect design, and supplied marine-grade fuse holder are described by DS18\u003c\/li\u003e\n\u003cli\u003eThermal, overload, short-circuit, and voltage protections\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eContinuous output: 4 x 200W RMS at 4 ohms; 4 x 300W RMS at 2 ohms\u003c\/li\u003e\n\u003cli\u003eBridged continuous output: 2 x 600W RMS at 4 ohms\u003c\/li\u003e\n\u003cli\u003ePeak output (manufacturer rating): 2,400W\u003c\/li\u003e\n\u003cli\u003eAmplifier topology: digital Class D; full-range, four channels\u003c\/li\u003e\n\u003cli\u003eMinimum load: 2 ohms per channel stereo \/ 4 ohms bridged\u003c\/li\u003e\n\u003cli\u003eFrequency response: 10Hz–20kHz\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio (1W at 4 ohms): \u0026gt;83dB\u003c\/li\u003e\n\u003cli\u003eEfficiency at 4 ohms: 83%\u003c\/li\u003e\n\u003cli\u003eTotal harmonic distortion: \u0026lt;0.04%\u003c\/li\u003e\n\u003cli\u003eInput impedance: 20k ohms\u003c\/li\u003e\n\u003cli\u003eChannel separation: 60dB\u003c\/li\u003e\n\u003cli\u003eLow-level input sensitivity: 200mV–5V\u003c\/li\u003e\n\u003cli\u003eCrossover: HPF \/ Full \/ LPF; 40Hz–2kHz\u003c\/li\u003e\n\u003cli\u003eFuse protection: 2 x 50A (100A total)\u003c\/li\u003e\n\u003cli\u003eThermal-protection threshold: 78°C\u003c\/li\u003e\n\u003cli\u003eSupply-voltage protection range: 7–16V\u003c\/li\u003e\n\u003cli\u003ePower-input wiring: 8 AWG tinned OFC\u003c\/li\u003e\n\u003cli\u003eProtection rating: IP67\u003c\/li\u003e\n\u003cli\u003eFinish: black brushed aluminum\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation \u0026amp; Setup\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSupply the unit from a properly fused 12V electrical system and route wiring according to ampacity and vessel\/vehicle practice\u003c\/li\u003e\n\u003cli\u003eObserve the 2-ohm stereo and 4-ohm bridged minimum impedance limits\u003c\/li\u003e\n\u003cli\u003eChoose HPF or other filter settings to match the connected speakers; avoid unnecessary deep bass in small full-range drivers\u003c\/li\u003e\n\u003cli\u003eKeep terminal connections secure and route signal leads away from high-current cables\u003c\/li\u003e\n\u003cli\u003eInstall in a location that permits service access and heat dissipation even with the IP67-rated enclosure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eWorks with marine and powersports audio systems accepting RCA low-level signal inputs and using compatible 2-ohm stereo or 4-ohm bridged loudspeaker loads\u003c\/li\u003e\u003c\/ul\u003e","brand":"DS18","offers":[{"title":"Default Title","offer_id":67902259298392,"sku":"CED-DS18NXL-X850.4D","price":649.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/8160\/files\/4314543.jpg?v=1792701444","url":"https:\/\/shipsound.com\/products\/ds18-nxl-x850-4d-hydro-4-channel-full-range-class-d-marine-powersports-amplifier-ip67-4-x-200w-rms-4-ohms","provider":"ShipSound.com","version":"1.0","type":"link"}